| From: | luis(dot)roberto(at)siscobra(dot)com(dot)br |
|---|---|
| To: | Semen Yefimenko <semen(dot)yefimenko(at)gmail(dot)com> |
| Cc: | pgsql-performance <pgsql-performance(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: Very slow Query compared to Oracle / SQL - Server |
| Date: | 2021-05-06 16:11:07 |
| Message-ID: | 1368981627.1376962.1620317467043.JavaMail.zimbra@siscobra.com.br |
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| Lists: | pgsql-performance |
----- Mensagem original -----
> De: "Semen Yefimenko" <semen(dot)yefimenko(at)gmail(dot)com>
> Para: "pgsql-performance" <pgsql-performance(at)lists(dot)postgresql(dot)org>
> Enviadas: Quinta-feira, 6 de maio de 2021 11:38:39
> Assunto: Very slow Query compared to Oracle / SQL - Server
> SELECT column1,..., column54 where ((entrytype = 4000 or entrytype = 4001 or
> entrytype = 4002) and (archivestatus <= 1)) order by timestampcol desc;
The first thing I would try is rewriting the query to:
SELECT column1,..., column54
FROM logtable
WHERE (entrytype in (4000,4001,4002))
AND (archivestatus <= 1))
ORDER BY timestampcol DESC;
Check if that makes a difference...
Luis R. Weck
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